2008 – Present, Chief, Medical Director and Clinical Professor, Division of Transfusion Medicine, Department of Pathology, City of Hope National Medical Center and Beckman Research Institute, Duarte, CA
2008 – Present, Staff, Department of Hematopoietic Cell Transplantation, City of Hope National Medical Center and Beckman Research Institute, Duarte, CA
2002 – 2008, Associate Director and Associate Clinical Professor, Division of Transfusion Medicine, Department of Pathology, City of Hope National Medical Center and Beckman Research Institute, Duarte, CA
2000 – 2002, Acting Director, Division of Transfusion Medicine, Department of Pathology, City of Hope National Medical Center and Beckman Research Institute, Duarte, CA
1996 – 2000, Staff Physician, Division of Transfusion Medicine, Department of Pathology, City of Hope National Medical Center and Beckman Research Institute, Duarte, CA